tonight president obama is ahead in the polls. today wisconsin become a hot campaign spot for both candidates. vice president biden talked to the voters at the red mug coffee shop in superior wisconsin, but he got up staged in milwaukee. katy perry performed some of her hit songs at the crowded rally before president obama spoke. she asked everybody there to donate to the red cross. she made this offer to encourage people to vote. >> if you're over 18, and you've got some real cool outfit you're going to wear on tuesday, you tweet that to me and i'll retweet you. because i'm going to pull out for sure as well. >> president obama didn't talk fashion. >> wisconsin, after four years as president, you know me. and so, so, you know -- you know me. you've watched me age before your eyes. and you may not agree with every decision i've made. sometimes you may have been frustrated by the pace of change, but you know where i stand. you know what i believe. you know i mean what i say. and i say what i mean. >> we are joined tonight by wiscon